appears also to have been referred to as the R130), was to be long, contain of gas and have a hull form resembling that of the 1920s British rigid R100, with four Pratt & Whitney Canada PT6 turboprop engines. It would have been capable of carrying payloads of up to . Redcoat Air Cargo proposed acquiring four R40s by 1984 and "opt[ing] out permanently from conventional aircraft." A second design, the R150, followed. The R150 was to have been long, with of gas and a payload of , and propelled by four Garrett AiResearch turboprops, with an additional Allison turboshaft providing air to nose- and tail-mounted thrusters for purposes of low-speed control. The use of natural gas, or a combination of natural gas and LPG, as fuel was considered. Unlike the R40/R130, which was to have had a traditional rigid structure, the R150 was intended to be a metal-clad airship, with a thin metal shell stabilised by an internal pressure of around . Federal Express (FedEx) was reportedly "negotiating the possible purchase" of a training airship" in early 1981, with the possibility of an order for R150 cargo airships to follow, and Redcoat—through which FedEx had approached AI— switched its order to the R150, ordering four airships with options on another ten. FedEx was motivated by fuel-efficiency concerns and considered airships suitable for lower-priority 48-hour package deliveries. However, FedEx shelved its airship plans in late 1981 and Redcoat went into voluntary liquidation in mid-1982 due to cash flow problems. When AI's rigid division was subsequently split off, the R150 design was inherited by Wren Skyships and Wren went on to propose new metal-clads of varying sizes. Demerger of Wren Skyships In late 1982, Wren formed Wren Skyships as a "breakaway" of the rigid airship design division from Airship Industries. The former Thermo-Skyships was demerged from Airship Industries, becoming Wren Skyships (after founder Major Malcolm Wren) and relocating to Jurby airfield on the Isle of Man. The firm continued metal-clad development and began work on a non-rigid design, the Advanced Non-Rigid (ANR). American Skyship Industries American Skyship Industries, Inc. (ASI) was established as the U.S. manufacturing arm of Wren Skyships, ostensibly for the production of Metal-clad airships. ASI was founded by partners, Russell Scoville II, and Major Malcolm W. Wren RE. in 1981. No manufacturing facility, nor any airship, was ever built. The City of Youngstown sold Lansdowne Airport to American